Home / 21,312.82-29,415.45-13,361.86

Finding the Fourth Proportional to 21,312.82, 29,415.45 and 13,361.86

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Solution

The fourth proportional to 21,312.82, 29,415.45 and 13,361.86 is: 18,441.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.82 : 29,415.45 = 13,361.86 : x
  2. Step 2: Convert to fraction form
    21,312.82/29,415.45 = 13,361.86/x
  3. Step 3: Cross multiply
    21,312.82x = 29,415.45 × 13,361.86
  4. Step 4: Simplify right side
    21,312.82x = 393,045,124.74
  5. Step 5: Solve for x
    x = 393,045,124.74/21,312.82
  6. Step 6: Final answer
    x = 18,441.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.